I am sad to say that I too am suffering from this symptom. It is one of the most scary symptoms that I have, to be honest. I feel like I'm losing my mind some days. I do forget things occasionally, but it's affected me the most in word selection. I'll be in the middle of a sentence & simply cannot place the word I want to use. It's quite frustrating to me, as I am young & was relatively healthy before all of this hit me.

I would say that I suspect the medicine, but I started out on Neurontin/Effexor and over time have switched to Lyrica/nortriptyline, and the issues have not changed, so I really don't know. I have read that it is a symptom of the CRPS itself, but I'd prefer to blame it on the meds. I just really don't know.